The westbound Interstate 90 off-ramp to state Route 900 closes from 8 p.m. – 5 a.m. Aug. 4-5. The state Department of Transportation plans to detour drivers to the exit at West Lake Sammamish Parkway Southeast.

The striping comes as the DOT completes a long-running effort to widen state Route 900 through Issaquah. Work on the $33.9 million project started in August 2008.

The transportation agency opened almost a mile of widened lanes between Southeast 82nd Street and Newport Way Northwest in April. The stretch carries about 16,000 vehicles per day.

Crews widened the road from Newport Way Northwest to the vicinity of Northwest Talus Drive and Southeast 82nd Street.